CVE-2025-26682

dotnet: .NET: ASP.NET Core denial of service with HTTP/3

Loading…

Severity

Important

Red Hat Product Security

7.5

CVSS 3.1

Review impact separately from score.

Published · April 9, 2025

Updated · July 3, 2026

Description

A flaw was found in dotnet. Improper use of the HTTP/3 protocol allows an unauthorized remote attacker to cause an allocation of resources without limits or throttling in ASP.NET Core, resulting in a denial of service.

Statement

This issue can only be exploited when support for the HTTP/3 protocol is enabled. The .NET packages shipped in Red Hat Enterprise Linux do not support the HTTP/3 protocol. Therefore, Red Hat products are not affected by this vulnerability.


.NET 6.0 for RHEL-8, RHEL-9 and RHIVOS has reached its End of Life as of November 12, 2024, and is no longer supported. For additional information about lifecycle for .NET on Red Hat Enterprise Linux, please refer to: https://access.redhat.com/support/policy/updates/net-core.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-770 · Allocation of Resources Without Limits or Throttling